I have a Lenovo all in one pc. In this pc, I have two operating system based on two different partitions.
I have Windows 7 on drive C and Windows XP on drive D. Now, I want to remove my second OS Windows XP from second drive D with safety.

Just make sure to backup any files you might need off the partition before hand. I would also make a complete image backup with something like MarciumReflect as seen at http://www.macrium.com/reflectfree.aspx this would allow easy recovery if you run into any issues. All the software mentioned is free. Good Luck.

Firsly set the primary OS as default OS(link) SetWindows as default OS then you can delete the secondary OS partition in disk management>right click on the partition(OS) to be deleted>Click delete
*note----You should be using PC in primary OS..!!

susendeep dutta

June 3, 2013 at 5:49 am

Have a look at the instructions in the link below which states how to safely achieve it -

If XP allows it, creating a system image is the solution. Remove all your personal files and let other things remain there including installed programs (if a huge one is there, you can uninstall it to reduce system image's size). Once you get it, you have your whole XP as it is.

First, make sure you have all of the data files you wish to preserve from your XP partition safely stored away somewhere else.

Next, open up an elevated command prompt (Run as Administrator) and type 'bcdedit /delete {ntldr} /f' at the prompt.

Now you can delete, reformat, repartition or otherwise reuse your D: drive.

Rajaa Chowdhury

June 3, 2013 at 12:06 am

Bruce has give you the correct advice follow it. However if you find command line a bit cryptic, use EaseUS Partition Master Home Edition, which is free. The link is : http://www.partition-tool.com/personal.htm